@fjarrett Okay, I developed the updater. I tested it carefully. This how it works:

1) It updates summary, connector, context and action for all previous file editions
2) It tries to find a theme by name and if one is found, theme slug is saved in meta
3) If we have theme slug in meta, we are able to display action links: Edit File and Edit Theme. Otherwise they are not present.

What I need to confirm is that connectors classes are available when `WP_Stream_Install::update()` is called, because I tested it by calling Editor's updater directly.